.all{
    width: 100%;
    height: 100vh;
}
.all .form-signin{
    width: 500px;
    margin: 0 auto;
}

.all .form-signin .form-signin-title{
    text-align: center;
    margin-bottom: 10px;
}

.all .form-signin .item, .checkbox{
    margin-bottom: 20px;
}

.all .form-signin .tip-msg{
    color: red;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-weight: 600;
}
